pneumoperitoneum
Pronunciation: nū′mō-per′i-tō-nē′ŭm
Definition: Presence of air or gas in the peritoneal cavity as a result of disease, or produced artificially in the abdomen to achieve exposure during laparoscopic surgery.
[G. pneuma, air, + peritoneum]
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Examples: glitazone, GI cocktail, etc.

